JP2020099529A - Buckle device - Google Patents

Abstract

To limit deviation to one side of an insertion body.SOLUTION: In a buckle device 10, the upper surface of a projection part 26A of an upper cover 12A comes in contact with the upper surface of an open hole 62 of a buckle body 54. Therefore, the upper surface of the open hole 62 limits deviation to the upper side of the upper surface of the projection part 26A to limit deviation of the upper side of the upper cover 12A to the buckle body 54 even when deviation force to the upper side is applied to the upper cover 12A.SELECTED DRAWING: Figure 2

Description

The present invention relates to a buckle device in which a tongue is inserted into an insert from one side.

In the buckle device described in Patent Document 1 below, a buckle body is provided in the cover, the lock plate is rotatably supported by the buckle body, and the tongue plate of the webbing is inserted into the cover from above, The webbing is mounted on the occupant by the lock plate being engaged with the tongue plate.

Here, in such a buckle device, an upward displacement force may be applied to the cover.

JP, 2013-141925, A

The present invention has been made in view of the above facts, and an object thereof is to obtain a buckle device capable of limiting the displacement of the insertion body to one side.

The buckle device according to the first aspect of the present invention is provided with a restricted portion, an insert body into which the tongue provided on the webbing is inserted from one side, and an insertion body provided in the insertion body, and the tongue provided to one side of the restricted portion. A support body provided with a restriction portion capable of restricting displacement; and an engagement body rotatably supported by the support body and engaged with the tongue to attach the webbing to an occupant. ..

A buckle device according to a second aspect of the present invention is the buckle device according to the first aspect of the present invention, which is provided on the support body, rotatably supports the engagement body, and supports the restricted portion. Equipped with.

A buckle device according to a third aspect of the present invention is the buckle device according to the first aspect or the second aspect of the present invention, which is provided in the restricted portion and extends on the side opposite to the restricted portion of the restricted portion. A stretching part is provided.

A buckle device according to a fourth aspect of the present invention is the buckle device according to the third aspect of the present invention, wherein the support can limit displacement of the extending portion.

In the buckle device of the first aspect of the present invention, the support body is provided in the insert body, the support body is rotatably supported by the support body, the tongue of the webbing is inserted into the insert body from one side, The webbing is attached to the occupant by the engagement body being engaged with the tongue.

Here, the limiting portion of the support body can limit the displacement of the insertion body to one side of the limited portion. Therefore, the displacement of the insertion body to one side can be limited.

In the buckle device of the second aspect of the present invention, the support portion of the support body rotatably supports the engagement body.

Here, the restricted portion covers the support portion. Therefore, it is possible to suppress the entry of foreign matter into the support portion.

In the buckle device of the third aspect of the present invention, the stretched portion of the restricted portion is stretched on the side opposite to the restricted portion of the restricted portion. Therefore, the strength of the restricted portion can be increased.

In the buckle device of the fourth aspect of the present invention, the support can limit the displacement of the extending portion. Therefore, the displacement of the insert body due to the displacement of the extending portion can be limited.

FIG. 3 is an exploded perspective view of the buckle device and the tongue plate according to the first embodiment of the present invention as seen from the upper left side. (A) And (B) is sectional drawing seen from the left which shows the buckle device and tongue plate which concern on 1st Embodiment of this invention, (A) shows the tongue plate non-attachment state of a buckle device. , (B) show the tongue plate mounted state of the buckle device. FIG. 3 is a perspective view showing the upper cover of the buckle device according to the first exemplary embodiment of the present invention viewed from the back side and the upper side. FIG. 3 is a perspective view showing the lower cover and the like of the buckle device according to the first exemplary embodiment of the present invention as viewed from the lower left side. (A) And (B) is sectional drawing seen from the bottom which shows the buckle apparatus which concerns on 1st Embodiment of this invention, (A) is sectional drawing seen from the lower end of the buckle apparatus, (B) is a cross-sectional view seen from below near the lower end of the buckle device. (A) And (B) is a figure which shows the buckle apparatus which concerns on 2nd Embodiment of this invention, (A) is a perspective view seen from diagonally downward left, (B) is a buckle apparatus. FIG. 4 is a cross-sectional view of the vicinity of the lower end of FIG.

[First Embodiment]
FIG. 1 is an exploded perspective view of a buckle device 10 according to a first embodiment of the present invention as seen from an obliquely upper left side, and FIG. 2A shows the buckle device 10 from a left side. It is shown in a cross-section view. In the drawings, the upper side of the buckle device 10 is indicated by an arrow UP, the front side (one side in the thickness direction) of the buckle device 10 is indicated by an arrow SF, and the left side of the buckle device 10 is indicated by an arrow LH.

The buckle device 10 according to the present embodiment is installed in a vehicle seat (for example, a seat cushion, not shown), and an occupant of the vehicle can sit on the seat. An installation recess is formed in the elastic portion of the seat, and the installation recess is open to the upper side of the vehicle. The buckle device 10 is inserted into the installation recess from the vehicle upper side, and the upper side of the buckle device 10 is directed to the vehicle upper side.

As shown in FIGS. 1 and 2(A), the buckle device 10 is provided with a cover 12 made of resin and having a substantially rectangular parallelepiped box shape as an insert. The cover 12 is constructed by assembling a front side upper cover 12A and a back side lower cover 12B. The upper cover 12A constitutes an upper end portion of the cover 12 and a front side portion other than the upper end portion, and the lower cover 12B is The back side portion other than the upper end portion of the cover 12 is configured. When the upper cover 12A and the lower cover 12B are assembled, the upper cover 12A is attached to the lower cover 12B with the back end of the upper end of the upper cover 12A engaged with the upper side of the back end of the lower cover 12B. The upper cover 12A is fitted to the lower cover 12B by being rotated downward and back.

A tongue insertion port 14 is formed at the upper end of the cover 12, and a tongue plate 16 as a tongue can be inserted into the tongue insertion port 14 from the upper side (one side). A rectangular flat plate-shaped insertion portion 16A is provided at the tip end portion of the tongue plate 16. The tongue plate 16 can be inserted into the tongue insertion port 14 at the insertion portion 16A, and the insertion portion 16A has a rectangular shape. A shaped engagement hole 18 is formed therethrough. A long belt-shaped webbing 20 is movably penetrated through a base end portion of the tongue plate 16, and the webbing 20 is installed in a vehicle.

The lower part of the front wall of the upper cover 12A is an inclined wall 12C as an inclined portion, and the inclined wall 12C is inclined in the direction toward the back side as it goes downward.

Engagement protrusions 22 (see FIGS. 3 and 5B) having a substantially rectangular columnar shape are integrally formed near the lower end at the back end of the left wall and the right wall of the upper cover 12A. 22 is projected in the left-right direction inner side of upper cover 12A. The engagement protrusion 22 extends in the vertical direction, and the front and side surfaces of the engagement protrusion 22 are arranged perpendicularly to the front and back directions. Engagement recesses 24 (see FIGS. 3 and 5B) having trapezoidal cross sections are formed on the left and right walls of the upper cover 12A on the front side of the engagement projections 22. Is stretched in the vertical direction, and the back side surface is constituted by the front side surface of the engaging convex portion 22. The engagement recess 24 is open to the inside in the left-right direction of the upper cover 12A, and the front side surface of the engagement recess 24 is inclined in the direction toward the front side toward the inside of the upper cover 12A in the left-right direction.

As shown in detail in FIG. 3, on the inclined wall 12C of the upper cover 12A, a substantially trapezoidal plate-shaped limiting plate 26 as a limited portion is integrally formed on the left portion and the right portion. It is projected on the back side. The limiting plate 26 is arranged vertically in the left-right direction, and the upper surface of the limiting plate 26 is arranged vertically in the vertical direction. A substantially trapezoidal plate-shaped projecting portion 26A is formed at the upper end of the limiting plate 26, and the projecting portion 26A projects to the back side. The upper surface of the protrusion 26A is arranged vertically in the vertical direction, and the back side surface of the protrusion 26A is arranged vertically in the front-back direction. A flat corner surface 26B is formed at the corner on the back side and the upper side of the protrusion 26A, and the corner surface 26B is inclined toward the back side as it goes downward. A portion of the limiting plate 26 below the projecting portion 26A is a stretched portion 26C. The stretched portion 26C is stretched in the vertical direction so that the back side surface is arranged vertically in the front-back direction and the lower end is the upper cover. It is integrated with the lower wall of 12A.

On the inclined wall 12C of the upper cover 12A, a substantially trapezoidal plate-shaped lower plate 28 as a reinforcing portion is integrally formed at the left end portion and the right end portion, and the lower plate 28 projects to the back side. The lower plate 28 is disposed vertically in the vertical direction, and the left and right lower plates 28 are integrated with the left wall and the right wall of the upper cover 12A, respectively. The left lower plate 28 is integrated with the upper end of the left limiting plate 26, and the upper surface is flush with the upper surface of the left limiting plate 26. The right lower plate 28 is the right limiting plate 26. And the upper surface thereof is flush with the upper surface of the right limiting plate 26. Further, the back side surface of the lower plate 28 is arranged on the front side of the corner surface 26B of the limiting plate 26.

On the inclined wall 12C of the upper cover 12A, a rectangular plate-shaped middle plate 30 as a reinforcing portion is integrally formed between the pair of restriction plates 26, and the middle plate 30 is projected to the back side. The middle plate 30 is arranged vertically in the vertical direction, and the middle plate 30 is integrated with the upper end of each limiting plate 26, and the upper surface thereof is flush with the upper surface of each limiting plate 26. Further, the back side surface of the middle plate 30 is arranged on the front side of the projecting portion 26A of the limiting plate 26.

A substantially trapezoidal plate-shaped upper plate 32 serving as a reinforcing portion is integrally formed on the upper side of each lower plate 28 on the inclined wall 12C of the upper cover 12A, and the upper plate 32 projects to the back side. The upper plate 32 is arranged vertically in the vertical direction, and the left and right upper plates 32 are integrated with the left wall and the right wall of the upper cover 12A, respectively. The right side and the back side of the left upper plate 32 are arranged flush with the right side and the back side of the left lower plate 28, respectively, and the left side and the back side of the right upper plate 32 are respectively placed on the right lower side. The plate 28 is arranged flush with the left side surface and the back side surface of the plate 28.

On the inclined wall 12C of the upper cover 12A, a rectangular plate-shaped intermediate plate 34 as a reinforcing portion is integrally formed at the left end portion and the right end portion, and the intermediate plate 34 is projected to the back side. The intermediate plate 34 is arranged vertically in the left-right direction, and the left intermediate plate 34 is integrated with the right end of the lower plate 28 and the right end of the upper plate 32 on the left side, and the right intermediate plate 34 is , The left end of the lower plate 28 and the left end of the upper plate 32 on the right side are integrated. The back side surface of the intermediate plate 34 is flush with the back side surfaces of the lower plate 28 and the upper plate 32.

The limiting plate 26 is reinforced by a lower plate 28, a middle plate 30, an upper plate 32, and an intermediate plate 34.

A substantially rectangular front hole 36A is formed through the lower wall of the upper cover 12A at the intermediate portion in the left-right direction of the back side portion, and the front hole 36A is open to the back side. On the lower wall of the upper cover 12A, a substantially trapezoidal plate-shaped displacement wall 38 as a displacement portion is formed at the left end and the right end of the front side portion of the front hole 36A, and the displacement wall 38 is perpendicular to the vertical direction. It is located in. The displacement wall 38 on the left side is integrated with the front side surface and the left side surface of the front hole 36A and is arranged below and on the back side of the left limiting plate 26, and the displacement wall 38 on the right side is the front surface of the front hole 36A. It is integrated with the side surface and the right surface, and is arranged below and on the back side of the right limiting plate 26.

As shown in detail in FIG. 4, a substantially rectangular back hole 36B is formed through the lower wall of the lower cover 12B from the lower end to the lower wall of the lower cover 12B at an intermediate portion in the left-right direction. It is open from the lower wall to the front side. The back hole 36B communicates with the front hole 36A of the upper cover 12A, and the front hole 36A and the back hole 36B constitute the communication hole 36. A flat contact plate 40 (see FIG. 5A) is formed on the left and right surfaces of the back side portion of the back hole 36B, and the contact plate 40 is integrated with the back wall of the lower cover 12B. .. The contact plate 40 projects from the back wall of the lower cover 12B to the front side, and the contact plate 40 is arranged vertically in the left-right direction. At the lower end of the lower cover 12B, a rectangular insertion hole 42 is formed on the outer side of the lower plate 12B in the left-right direction of each contact plate 40, and the insertion hole 42 penetrates the lower wall of the lower cover 12B to form a lower side. It is open to the public.

A left engagement claw 44 (see FIG. 5B) and a right engagement claw 46 are formed at the left end and the right end near the lower end of the lower cover 12B, respectively. 46 are respectively integrated with the left wall and the right wall of the lower cover 12B. The left engaging claw 44 and the right engaging claw 46 are integrated with the back wall of the lower cover 12B, and the left engaging claw 44 and the right engaging claw 46 project from the lower cover 12B to the front side.

Trapezoidal columnar engagement protrusions 48 are integrally formed on the front end portions of the left wall of the left engagement pawl 44 and the right wall of the right engagement pawl 46, and the front surface of the engagement protrusion 48 is a lower cover 12B. It is inclined in the direction toward the back side as it goes outward in the left-right direction, and the back side surfaces are arranged vertically in the front-back direction. An engagement groove 50 having a rectangular cross section is formed on the left side of the left engagement claw 44 and the right wall of the right engagement claw 46 on the back side of the engagement protrusion 48. 12B is opened to the outside in the left-right direction, and the front side surface is constituted by the back side surface of the engaging projection 48.

The left side engaging concave portion 24 and the engaging convex portion 22 of the upper cover 12A are engaged (fitted) with the engaging protrusion 48 and the engaging groove 50 of the left engaging pawl 44, respectively, and the right engaging pawl is formed. The right engagement recess 24 and the engagement protrusion 22 of the upper cover 12A are engaged (fitted) with the engagement protrusion 48 and the engagement groove 50 of the reference numeral 46, respectively. The movement of 22 toward the front side with respect to each engaging projection 48 is restricted, and the separation of the upper cover 12A from the lower cover 12B toward the front side is restricted.

The left engaging claw 44 is formed with a plurality of rectangular plate-shaped holding plates 44A (three in the present embodiment), and the plurality of holding plates 44A respectively project from the left wall of the left engaging claw 44 to the right side. And are separated from each other in the vertical direction. The holding plate 44A is arranged vertically in the vertical direction, and the holding plate 44A is integrated with the back wall of the lower cover 12B.

A plurality of rectangular plate-shaped connecting plates 46A (three in the present embodiment) are formed on the right engaging claw 46, and the plurality of connecting plates 46A respectively project from the right wall of the right engaging claw 46 to the left side. And are separated from each other in the vertical direction. The connecting plate 46A is arranged vertically in the vertical direction, and the connecting plate 46A is integrated with the back wall of the lower cover 12B. A rectangular plate-shaped connecting plate 46B is integrally formed on the left side of the connecting plate 46A, and the connecting plate 46B connects the left ends of the plurality of connecting plates 46A. The connection plate 46B is arranged vertically in the left-right direction, and the connection plate 46B is integrated with the back wall of the lower cover 12B. A regulation frame 46C having a U-shaped cross section is integrally formed on the left side of the front side portion of the connecting plate 46A, and the regulation frame 46C is projected to the left side. The regulation frame 46C extends in the vertical direction, and the left surface of the regulation frame 46C is arranged flush with the left surface of the contact plate 40 on the right side of the lower cover 12B.

At the left end and the lower end of the lower cover 12B, a regulation protrusion 52 (see FIG. 5A) having a substantially L shape when viewed from the front side is formed. The lower portion of the restriction protrusion 52 other than the right portion is formed as a bent rectangular columnar extension portion 52A, and the extension portion 52A has the lower portion extended in the left-right direction on the front side of the lower wall of the lower cover 12B. The left side portion is vertically extended on the front side of the left wall of the lower cover 12B. The upper portion other than the right portion of the restriction protrusion 52 is a substantially rectangular plate-shaped connecting portion 52B, and the connecting portion 52B extends toward the upper side toward the left side, and at the same time as the back wall of the lower cover 12B. It is one. The left end (upper end) of the connecting portion 52B is integrated with the lower end (lower sandwiching plate 44A) of the left engaging claw 44, and the front end of the right end (lower end) of the connecting portion 52B is the right end of the extending portion 52A. It is integrated with.

The right portion of the regulation protrusion 52 is a regulation convex portion 52C, and the regulation convex portion 52C extends rightward from the right end of the extension portion 52A and the front side portion of the right end of the communication portion 52B. The restriction protrusion 52C is disposed on the front side of the insertion hole 42 on the left side of the lower cover 12B, and the right surface of the restriction protrusion 52C is flush with the right surface of the contact plate 40 on the left side of the lower cover 12B. There is. A restriction recess 52D having a rectangular cross section is formed on the back side of the restriction projection 52C, and the restriction recess 52D is open to the back side. The restriction recess 52D extends in the up-down direction and is open to the upper side and the lower side. The restriction recess 52D has its left surface flush with the left surface of the left insertion hole 42, and its right surface inserted on the left. It is arranged at a position flush with the right surface of 42.

Inside the cover 12, a buckle body 54 (see FIG. 4), which is made of metal and has a U-shaped cross section, is arranged as a support, and the buckle body 54 is formed in a symmetrical shape with respect to the center plane in the left-right direction. ing. The buckle body 54 is fixed to the lower cover 12B, and the inside of the buckle body 54 is open to the front side. The back side portion of the buckle body 54 is a long flat plate-shaped bottom plate 54A, and the bottom plate 54A is arranged vertically in the front-back direction. The left side portion and the right side portion of the buckle body 54 are formed as long flat plate side plates 54B, and the side plates 54B are arranged vertically in the left-right direction. The inside of the buckle body 54 is communicated with the tongue insertion port 14 of the cover 12, and the insertion portion 16A of the tongue plate 16 inserted into the tongue insertion port 14 is inserted into the buckle body 54 from above.

A front end portion of a belt-shaped belt 56 as a fixing member is inserted through a lower end portion of the bottom plate 54A of the buckle body 54, and the front end portion of the belt 56 is formed in an annular shape and fixed to the lower end portion of the bottom plate 54A. ing. The belt 56 extends to the lower side of the cover 12 through the communication hole 36 of the cover 12 and penetrates the vehicle lower side portion from the seat installation recess, and the base end portion of the belt 56 is fixed to the vehicle body. As a result, the movement of the buckle body 54 to the upper side of the vehicle is restricted, and the buckle device 10 is installed in the vehicle. In addition, a substantially rectangular insertion hole 58 is formed through the central portion of the bottom plate 54A in the vertical direction, and the insertion hole 58 extends in the vertical direction.

The left and right side plates 54B of the buckle body 54 are in contact with the contact plates 40 on the left and right sides of the lower cover 12B, respectively, in the lower part, and the lower part of the buckle body 54 is left and right between the contact plates 40 in the left-right direction. It is pinched. The right side surface of the regulation projection 52C of the regulation projection 52 of the lower cover 12B is in contact with the left side plate 54B of the buckle body 54 (see FIG. 5A), whereby the buckle body 54 passes through the regulation projection 52. By restricting the left engaging claw 44 of the lower cover 12B from tilting to the right side, and effectively moving the left engaging projection 22 on the left side of the upper cover 12A relative to the engaging projection 48 of the left engaging claw 44. It is restricted. The left side plate 54B of the buckle body 54 is in contact with the left surface of the restriction frame 46C of the right engaging claw 46 of the lower cover 12B, whereby the buckle body 54 restricts the right engaging claw 46 from tilting to the left. Then, the movement of the right engagement projection 22 of the upper cover 12A toward the front side of the right engagement claw 46 with respect to the engagement projection 48 is effectively limited. Therefore, the separation of the upper cover 12A from the lower cover 12B to the front side is effectively limited.

A substantially rectangular support hole 60 as a support portion is formed through the lower portion of each side plate 54B. In the lower part of each side plate 54B, on the front side of the support hole 60, a rectangular open hole 62 as an open portion is formed so as to penetrate therethrough, and the open hole 62 is open to the upper side. The open hole 62 is arranged so as to be shifted upward with respect to the support hole 60, and the open hole 62 opens the upper part of the support hole 60 to the front side. The upper surface of the open hole 62 is arranged vertically in the vertical direction, and the back side surface of the open hole 62 is arranged vertically above the support hole 60 in the front-back direction.

In the lower part of each side plate 54B, a substantially trapezoidal plate-shaped limiting wall 64 as a limiting portion is formed above the supporting hole 60 and the opening hole 62, and the lower side surface of the limiting wall 64 is the supporting hole 60 and the opening. The upper peripheral surface of the hole 62 (including the upper surface of the open hole 62) is configured. A guide surface 64A is formed on the front side surface of the limiting wall 64, and the guide surface 64A is inclined toward the back side as it goes downward.

The protruding portion 26A of the limiting plate 26 of the upper cover 12A is inserted into the opening hole 62, and the front side of the support hole 60 and the opening hole 62 is covered (closed) by the protruding portion 26A and the upper end of the extending portion 26C of the limiting plate 26. ) Has been. The lateral center surface of the side plate 54B (opening hole 62) is arranged at a position flush with the lateral center surface of the limiting plate 26, and the upper surface of the opening hole 62 is in contact with the upper surface of the protruding portion 26A. While being (surface contact), the back side surface of the protruding portion 26A is slightly separated from the back side surface of the open hole 62 on the front side. When the upper cover 12A is rotated to the lower side and the lower side with respect to the lower cover 12B to assemble the upper cover 12A and the lower cover 12B, the corner surface 26B of the protruding portion 26A is guided to the guide surface 64A of the limiting wall 64. Then, the protruding portion 26A is inserted into the open hole 62 by temporarily displacing the limiting plate 26 downward while the peripheral portion of the upper cover 12A surrounding the limiting plate 26 is deformed to the back side.

A displacement plate 66 having a substantially rectangular plate shape is formed in the lower portion of each side plate 54B below the support hole 60 and the opening hole 62, and the upper side surface of the displacement plate 66 includes the support hole 60 and the opening hole 62. It constitutes the lower surface. The front and side surfaces of the displacement plate 66 are arranged vertically in the front and back directions, and the lower surface of the displacement plate 66 is arranged vertically in the vertical direction, and the lower surface of the displacement plate 66 is located above the lower surface of the side plate 54B. It is arranged. A displacement surface 66A is formed at the front and lower corners of the displacement plate 66, and the displacement surface 66A is inclined toward the back side as it goes downward.

The extended portion 26C of the limiting plate 26 of the upper cover 12A is in contact (surface contact) with the front surface of the displacement plate 66, and the upper surface of the displacement wall 38 of the upper cover 12A is slightly smaller than the lower surface of the displacement plate 66. Are spaced downwards. When the upper cover 12A is rotated to the lower side and the lower side with respect to the lower cover 12B to assemble the upper cover 12A and the lower cover 12B, the displacement wall 38 is guided by the displacement surface 66A of the displacement plate 66, and temporarily. Accordingly, the displacement wall 38 is disposed below the displacement plate 66 by displacing the displacement wall 38 downward while the peripheral portion of the displacement wall 38 of the upper cover 12A is deformed downward.

A resin-made substantially plate-shaped ejector 68 as a moving member is engaged with the insertion hole 58 of the bottom plate 54A of the buckle body 54, and the ejector 68 is slidable in the vertical direction along the insertion hole 58. ing. A pressing surface 68A is formed on the upper surface of the ejector 68, and the pressing surface 68A is arranged on the front side of the bottom plate 54A.

An ejector spring 70 (compression coil spring) as an urging member is hung between the ejector 68 and the lower end of the insertion hole 58, and the ejector spring 70 urges the ejector 68 upward to move the ejector 68 upward. It is arranged at the discharge position (see FIG. 2(A)). When the insertion portion 16A of the tongue plate 16 is inserted into the buckle body 54 from above, the pressing portion 68A of the ejector 68 is pressed downward by the insertion portion 16A, so that the ejector 68 is attached to the ejector spring 70. It is slid downward against the power and is placed at the lower insertion position (see FIG. 2B).

Inside the buckle body 54, on the front side of the ejector 68, a metal plate-shaped lock plate 72 as an engaging body (restricting member) is arranged, and the lock plate 72 is symmetrical with respect to the center plane in the left-right direction. Is shaped.

A rectangular plate-shaped support shaft 72A as a supported portion is integrally formed at the lower end portion of the lock plate 72 at the left end portion and the right end portion, and the support shaft 72A projects outward in the left-right direction of the lock plate 72. Has been done. The support shaft 72A is inserted through the support hole 60 of the side plate 54B of the buckle body 54, and the lock plate 72 is supported by the buckle body 54 at the pair of support shafts 72A, and is located on the back side and the front side about the support shaft 72A. It is rotatable.

Plate-shaped arm portions 72B are integrally formed at the left end portion and the right end portion near the lower end portion of the lock plate 72, and the arm portions 72B project to the outer side in the left-right direction of the lock plate 72 and at the back side. It has been extended. The arm portions 72B are inserted into the buckle body 54, and when the ejector 68 slides downward from the ejection position, the ejector 68 pushes each arm portion 72B downward, and the lock plate 72 rotates to the back side. (See FIG. 2B).

A substantially rectangular plate-shaped engaging piece 72C as an engaging portion is formed at the upper end portion of the lock plate 72, and the engaging piece 72C extends upward in the direction toward the back side. The engagement piece 72C is in contact with the front side surface of the ejector 68, whereby rotation of the lock plate 72 to the back side is blocked, and the lock plate 72 is held at the front side released position. When the lock plate 72 is rotated to the back side and reaches the engagement position on the back side, the engagement piece 72C is inserted (engaged) into the engagement hole 18 of the tongue plate 16 and is moved above the tongue plate 16. The slide to (see FIG. 2(B)).

A rectangular plate-shaped contact piece 72D is formed on the upper end portion of the lock plate 72 on both outer sides in the left-right direction of the engagement piece 72C, and the contact piece 72D projects upward.

Inside the cover 12, a columnar lock member 74 (cam) is provided on the front side and the upper side of the lock plate 72, and the lock member 74 is arranged along the left-right direction. A columnar shaft 74A penetrates through the lock member 74, and the shaft 74A projects to the outside of the lock member 74 in the left-right direction. The shaft 74A is rotatably supported by each side plate 54B of the buckle body 54, whereby the lock member 74 is swingably supported by the buckle body 54 about the shaft 74A.

A substantially rectangular plate-shaped pressed portion 74B is formed on the front side portion of the lock member 74, and the pressed portion 74B is projected to the front side. The lower surface of the back side portion of the lock member 74 is a contact surface 74C, and the contact surface 74C contacts the upper surface of the contact piece 72D of the lock plate 72 to hold the lock member 74 in the unlocked position. ing. The back surface of the lock member 74 is a lock surface 74D, and the lock surface 74D is a circumferential surface coaxial with the shaft 74A. When the lock plate 72 is arranged at the engagement position, the lock member 74 is swung to the lock position, and the lock surface 74D is brought into contact with the front surface of the contact piece 72D of the lock plate 72 (FIG. 2). (See (B)).

A substantially U-shaped frame-shaped holder 76 made of resin is attached to the upper side of the back side portion of the lock member 74. A substantially rectangular plate-shaped spring hold portion 76A is formed at the center of the holder 76 in the left-right direction, and the spring hold portion 76A projects upward.

A release button 78 as an operating member is provided on the upper side of the lock member 74. The lower portion of the release button 78 is engaged with each side plate 54B of the buckle body 54, and the release button 78 is supported by the buckle body 54 so as to be vertically movable within a predetermined range.

A box-shaped operation portion 78A is provided on the upper portion of the release button 78, and the operation portion 78A forms the tongue insertion opening 14 at the upper end of the cover 12 between the operation portion 78A and the backside portion of the upper end portion of the upper cover 12A. At the same time, the inside is open downward. The upper surface of the operating portion 78A is exposed from the upper end of the cover 12 to the upper side, and the release button 78 can be pressed downward by the occupant in the operating portion 78A.

The release button 78 has a pressing portion 78B formed on the front side and the lower side of the operating portion 78A, and the pressing portion 78B is projected downward. The pressing portion 78B is arranged above the pressed portion 74B of the lock member 74, and when the release button 78 is pressed downward, the pressing portion 78B presses the pressed portion 74B downward. The lock member 74 is swung to the unlock position side.

A lock spring 80 (compression coil spring) is hung between the upper wall of the operation portion 78A of the release button 78 and the spring hold portion 76A of the holder 76. The lock spring 80 is a lock member via the holder 76. 74 is biased to the lock position side.

As shown in detail in FIG. 4, a buckle switch 82 (contact switch) as a detection mechanism is attached to the left side of the buckle body 54 in the lower cover 12B.

Below the buckle switch 82, a substantially rectangular parallelepiped box-shaped substrate base 82A (holder) serving as a holding member is provided, and the inside of the substrate base 82A is open to the left side and the upper side. A plurality of holding plates 44A of the left engaging claws 44 of the lower cover 12B are brought into contact with the left side of the substrate base 82A, and the left side plate 54B of the buckle body 54 and the left side of the lower cover 12B are provided with the right side of the substrate base 82A. Of the contact plate 40 (see FIGS. 5A and 5B), the substrate base 82A is clamped between the upper pair of clamping plates 44A and the buckle body 54. The substrate base 82A and the left contact plate 40 are sandwiched between the lower sandwiching plate 44A and the buckle body 54. The buckle body 54 regulates tilting of the left engaging claw 44 to the right side via the board base 82A, and tilts the left engaging claw 44 to the right side via the board base 82A and the left contact plate 40. This restricts the movement of the left engagement projection 22 of the upper cover 12A toward the front side of the left engagement claw 44 with respect to the engagement projection 48, thereby effectively restricting the upper cover 12A from the lower cover 12B. Departure to the front side is effectively restricted.

A lower end of a long rectangular flat plate-shaped switch board 82B (stator) serving as a detection member is fixed in the board base 82A, and the switch board 82B extends upward from the board base 82A and extends in the left-right direction. Are arranged vertically. A pair of harnesses 82C are electrically connected to the lower end portion of the switch board 82B, and the pair of harnesses 82C extend downward from the board base 82A. The pair of harnesses 82C are inserted into the insertion holes 42 on the left side of the lower cover 12B and extend to the lower side of the lower cover 12B, and the switch board 82B is connected to the vehicle control device (shown in the figure) via the pair of harnesses 82C. (Omitted) electrically connected to.

In the case where the buckle switch 82 is assembled in the lower cover 12B, when the pair of harnesses 82C are inserted into the left insertion hole 42, the pair of harnesses 82C are detached from the insertion hole 42 to the front side and the right side, respectively. It is limited by the contact plate 40 and the front side surface (bottom surface) of the restriction recess 52D of the restriction protrusion 52 (regulation protrusion 52C) in the lower cover 12B.

A substantially rectangular parallelepiped slide member 82D (slider) as a connecting member is supported on the right side of the switch board 82B, and the slide member 82D is vertically slidable along the switch board 82B. A substantially rectangular columnar boss (not shown) is integrally formed on the right surface of the slide member 82D, and the boss extends to the right side and penetrates the left side plate 54B of the buckle body 54 in a vertically slidable manner. doing. The boss is engaged with the ejector 68, whereby the slide member 82D can be slid vertically with the ejector 68 integrally. The slide member 82D is arranged at a position above the switch board 82B, and when the insertion portion 16A of the tongue plate 16 is inserted into the tongue insertion opening 14 at the upper end of the cover 12 and the ejector 68 is slid downward. The slide member 82D is slid downward. The switch board 82B is capable of detecting the slide position of the slide member 82D in the vertical direction, and the switch board 82B detects the slide position of the slide member 82D in the vertical direction, so that the ejector 68 moves in the vertical direction. The slide position is detected, and the ejection of the tongue plate 16 from the inside of the cover 12 and the insertion of the tongue plate 16 into the inside of the cover 12 are detected.

Next, the operation of this embodiment will be described.

The buckle device 10 having the above-described configuration is inserted into the installation recess of the seat, and the movement of the buckle body 54 in the cover 12 to the vehicle upper side is restricted by the belt 56.

When the insertion portion 16A of the tongue plate 16 is inserted into the tongue insertion opening 14 at the upper end of the cover 12, the pressing surface 68A of the ejector 68 is pressed downward by the insertion portion 16A, so that the ejector 68 causes the ejector spring 70 to move. It is slid downward against the urging force of and is slid from the ejection position to the insertion position. Therefore, the ejector 68 is slid below the engagement piece 72C of the lock plate 72 and presses each arm portion 72B of the lock plate 72 downward, whereby the lock plate 72 is rotated to the back side, It is rotated from the disengaged position to the engaged position.

As a result, the engagement piece 72C is inserted into the engagement hole 18 of the insertion portion 16A. Further, the contact piece 72D of the lock plate 72 is rotated to the back side of the contact surface 74C of the lock member 74, and the lock member 74 is swung from the unlock position to the lock position by the urging force of the lock spring 80. Then, the lock surface 74D of the lock member 74 is brought into contact with the front surface of the contact piece 72D, and the rotation of the lock plate 72 from the engaged position to the released position is restricted. Therefore, the lower surface of the engagement hole 18 is brought into contact with the engagement piece 72C, and the engagement piece 72C restricts the upward movement of the tongue plate 16, so that the tongue plate 16 is locked to the buckle device 10. Then, the webbing 20 is attached to the occupant sitting on the seat.

When the operation portion 78A of the release button 78 is pressed downward, the pressed portion 74B of the release button 78 presses the pressed portion 74B of the lock member 74 downward, so that the lock member 74 is attached to the lock spring 80. It swings from the locked position to the unlocked position against the force. Then, the lock surface 74D of the lock member 74 is swung above the contact piece 72D of the lock plate 72, and the rotation restriction of the lock plate 72 by the lock member 74 is released. Therefore, the ejector spring 70 moves the ejector 68, the tongue plate 16 and the engagement piece 72C of the lock plate 72 upward by the urging force, and the lock plate 72 is rotated from the engagement position to the release position. The engagement piece 72C is disengaged from the engagement hole 18 of the insertion portion 16A of the tongue plate 16. Further, the ejector 68 is slid upward to the ejection position by the urging force of the ejector spring 70, and the ejector 68 ejects the insertion portion 16A from the tongue insertion opening 14 at the upper end of the cover 12, thereby providing a tongue plate to the buckle device 10. The lock of 16 is released, and the attachment of the webbing 20 to the occupant is released.

Further, in the buckle switch 82, the slide member 82D is vertically slid together with the ejector 68, and the switch substrate 82B detects the slide position of the slide member 82D in the vertical direction. Therefore, the vertical slide position of the ejector 68 is detected, and the tongue plate 16 is inserted into the cover 12 (the webbing 20 is attached to an occupant) and the tongue plate 16 is discharged from the inside of the cover 12 (the webbing 20). Is removed from the passenger) is detected.

Here, the upper surface of the protruding portion 26A of the limiting plate 26 in the upper cover 12A of the cover 12 is in contact with the upper surface of the opening hole 62 in the side plate 54B of the buckle body 54. Therefore, for example, at the time of a vehicle collision, the cover 12 is sandwiched between the vehicle seat and the console box or between the stored seats, and a compressive force is applied to the cover 12 in the front and back directions, so that the inclined wall of the upper cover 12A. Even when an upward displacement force is exerted on the upper cover 12A by a rearward compressive force exerted on the 12C, the upper surface of the opening hole 62 limits the upward displacement of the upper surface of the protrusion 26A. As a result, the upper cover 12A can be restricted from being displaced upward with respect to the buckle body 54 and the lower cover 12B, and the upper cover 12A can be restricted from being disengaged from the lower cover 12B toward the upper side.

Further, the extending portion 26C of the limiting plate 26 is extended downward (on the side opposite to the upper surface of the open hole 62 of the limiting plate 26). Therefore, the strength of the restricting plate 26 in the vertical direction can be increased, and the upper surface of the opening hole 62 restricts the upward displacement of the upper surface of the protruding portion 26A, so that the upper cover 12A moves upward with respect to the buckle body 54 and the lower cover 12B. Can be effectively limited, and the upper cover 12A can be effectively limited from being detached from the lower cover 12B to the upper side.

Moreover, the limiting plate 26 is reinforced by the lower plate 28, the middle plate 30, the upper plate 32, and the intermediate plate 34 of the upper cover 12A. Therefore, the strength of the limiting plate 26 in the vertical direction can be further increased, and the upper surface of the opening hole 62 restricts the displacement of the upper surface of the protruding portion 26A to the upper side, whereby the upper side of the upper cover 12A with respect to the buckle body 54 and the lower cover 12B. Can be more effectively limited, and the upper cover 12A can be more effectively limited from being disengaged from the lower cover 12B to the upper side.

Further, the back side surface of the extending portion 26C of the limiting plate 26 is in contact with the front side surface of the displacement plate 66 of the side plate 54B of the buckle body 54. Therefore, when a rearward displacement force is applied to the upper cover 12A, the front side surface of the displacement plate 66 can limit the rearward displacement of the rear side surface of the extending portion 26C, and the buckle body 54 and the lower cover of the upper cover 12A. The displacement to the back side with respect to 12B can be limited.

The front side of the support hole 60 and the open hole 62 in the side plate 54B of the buckle body 54 is covered by the protruding portion 26A and the front end of the extending portion 26C of the limiting plate 26. Therefore, foreign matter can be prevented from entering the support hole 60 from the front side of the side plate 54B through the open hole 62, and the rotation of the support shaft 72A of the lock plate 72 in the support hole 60 can be prevented from being hindered by the foreign matter. Thus, it is possible to prevent the rotation of the lock plate 72 from being obstructed by foreign matter.

In the present embodiment, the buckle switch 82 is provided inside the cover 12. However, the buckle switch 82 may not be provided in the cover 12. Even in this case, the right side surface of the restricting projection 52C of the restricting projection 52 of the lower cover 12B is brought into contact with the left side plate 54B of the buckle body 54, and the buckle body 54 moves through the restricting projection 52 to the left engaging claw 44 of the lower cover 12B. By restricting the tilting to the right, the leftward movement of the left engagement claw 44 of the left engagement projection 22 of the upper cover 12A with respect to the engagement projection 48 is effectively limited, and the lower cover of the upper cover 12A is restricted. Front side departure for 12B is effectively limited.

[Second Embodiment]
FIG. 6(A) shows a buckle device 90 according to a second embodiment of the present invention in a perspective view seen from the lower left, and FIG. 6(B) shows a lower end of the buckle device 90. The vicinity is shown in a sectional view as seen from above.

The buckle device 90 according to the present embodiment has substantially the same configuration as that of the first embodiment, but differs in the following points.

As shown in FIGS. 6A and 6B, in the buckle device 90 according to the present embodiment, the front claw 92 is formed on the lower wall of the upper cover 12A on the left side and the back side of the left displacement wall 38. The front claw 92 is protruded to the back side, and the right surface thereof constitutes the left surface of the front hole 36A of the upper cover 12A. A trapezoidal column-shaped front convex portion 92A is formed on the back side portion of the front pawl 92, and the front convex portion 92A is protruded to the left side and the front and side surfaces are arranged vertically in the front and rear direction.

A back claw 52E is formed on the right portion of the regulation projection 52 of the lower cover 12B in place of the regulation projection 52C. The back claw 52E is formed at the right end of the extension 52A and the right end of the connecting portion 52B of the regulation projection 52. It is formed on the right side of the front side portion and protrudes to the front side from the lower wall of the lower cover 12B. A trapezoidal pillar-shaped back convex portion 52F is formed on the front side portion of the back claw 52E, and the back convex portion 52F is projected to the right side and the back side surface is arranged vertically in the front-back direction. On the back side of the back convex portion 52F, the front convex portion 92A of the front claw 92 of the upper cover 12A is arranged in a state in which the front convex portion 92A is slightly separated from the back convex portion 52F. By restricting the movement, the separation of the upper cover 12A from the front surface of the lower cover 12B is restricted. When the upper cover 12A is rotated downward and rearward with respect to the lower cover 12B to assemble the upper cover 12A and the lower cover 12B, the displacement wall 38 on the left side of the upper cover 12A is displaced on the left side of the buckle body 54. By being guided by the displacement surface 66A of the plate 66, the peripheral portion of the displacement wall 38 of the upper cover 12A is temporarily deformed downward, and the displacement wall 38 and the front pawl 92 are displaced downward. The front convex portion 92A passes under the back convex portion 52F, and the front convex portion 92A is inserted into the back side of the back convex portion 52F.

Here, also in this embodiment, the same operation and effect as those of the first embodiment can be obtained.

In addition, when the front cover disengagement force with respect to the lower cover 12B is applied to the upper cover 12A, when the left engagement claw 44 of the lower cover 12B is tilted to the right side by the left engagement protrusion 22 of the upper cover 12A, The left engaging claw 44 moves the back claw 52E of the restriction projection 52 of the lower cover 12B to the right side, and the amount of arrangement of the front projection 92A of the front claw 92 of the upper cover 12A on the back side of the back projection 52F of the back claw 52E. Will grow. Therefore, it is possible to effectively limit the movement of the front convex portion 92A to the front side with respect to the back convex portion 52F, and it is possible to effectively limit the separation of the upper cover 12A from the lower cover 12B to the front side.

Further, when the front cover is disengaged from the lower cover 12B by the front side, the back claw 52E of the restriction projection 52 of the lower cover 12B is tilted leftward by the front projection 92A of the front claw 92 of the upper cover 12A. In this case, the left protrusion claw 44 of the lower cover 12B is moved to the left by the restriction protrusion 52, and the engagement force of the left engagement protrusion 22 of the upper cover 12A to the engagement groove 50 of the left engagement claw 44 is increased. growing. For this reason, it is possible to effectively limit the movement of the left engagement claw 44 of the engagement protrusion 22 to the front side with respect to the engagement projection 48, and it is possible to effectively limit the detachment of the upper cover 12A from the front cover to the lower cover 12B. ..

In the present embodiment, the buckle switch 82 is provided inside the cover 12. However, the buckle switch 82 may not be provided in the cover 12. Even in this case, as described above, when the front cover 12A is subjected to a front-side detaching force with respect to the lower cover 12B, the front cover 92 of the upper cover 12A on the back side of the back convex portion 52F of the back cover 52E of the lower cover 12B faces. The arrangement amount of the convex portion 92A becomes large, or the engaging force of the left engaging convex portion 22 of the upper cover 12A with respect to the engaging groove 50 of the left engaging claw 44 of the lower cover 12B becomes large, so that the upper cover 12A. It is possible to effectively limit the detachment of the lower cover 12B from the front side.

In addition, in the first and second embodiments described above, the upper surface of the protruding portion 26A of the upper cover 12A is brought into contact with the upper surface of the open hole 62 of the buckle body 54. However, the upper surface of the protrusion 26A of the upper cover 12A may be slightly separated from the upper surface of the opening hole 62 of the buckle body 54. In this case, when an upward displacement force is applied to the upper cover 12A, the upper surface of the projecting portion 26A of the upper cover 12A is brought into contact with the upper surface of the open hole 62, and the upper surface of the open hole 62 becomes the projecting portion 26A. Limit the displacement of the upper surface to the upper side.

Furthermore, in the first and second embodiments described above, the back side surface of the extending portion 26C of the upper cover 12A is brought into contact with the front side surface of the displacement plate 66 of the buckle body 54. However, the back side surface of the extending portion 26C of the upper cover 12A may be slightly separated from the front side surface of the displacement plate 66 of the buckle body 54. In this case, when a rearward displacement force is applied to the upper cover 12A, the back side surface of the extension portion 26C is brought into contact with the front side surface of the displacement plate 66, and the front side surface of the displacement plate 66 is attached to the back side of the extension portion 26C. Limit displacement to the back of the face.

10... Buckle device, 12... Cover (insert body), 16... Tongue plate (tongue), 20... Webbing, 26... Limiting plate (restricted portion), 26C... Stretching 54... Buckle body (support), 60... Support hole (support), 64... Limit wall (limit), 72... Lock plate (engagement), 90... Buckle device

Claims (4)

An insert body in which a limited portion is provided and a tongue provided in the webbing is inserted from one side,
A support body provided in the insertion body, and provided with a limiting portion capable of limiting the displacement of the limited portion to one side;
An engagement body that is rotatably supported by the support body, and that the webbing is attached to an occupant by being engaged with the tongue,
Buckle device. The buckle device according to claim 1, further comprising a support portion that is provided on the support body, rotatably supports the engagement body, and covers the restricted portion. The buckle device according to claim 1 or 2, further comprising: an extension portion that is provided in the restricted portion and that extends toward the opposite side of the restricted portion from the restriction portion. The buckle device according to claim 3, wherein the support body is configured to be capable of limiting the displacement of the extending portion.